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How would you carry out a flame test and what colours would Li+, Na+, K+ and Ca2+ ions form?

Use a clean platinum wire loop. To clean the loop, dip in dilute HCl and hold in flame until the flame burns without any colour. Then dip clean loop into samples. Li+ turns the flame red, Na+ yellow\orange f...
RP
Answered by Rosie P. • Chemistry tutor
4379 Views

When do halogens displace each other in solutions of their salts?

More reactive halogens displace less reactive halogens. The more reactive halogens are those at the top of the group, as their outer electron shells (negatively charged) are closer to the nucleus (positively...
AP
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Describe and compare three features of the structure and bonding in the three allotropes of carbon: diamond, graphite and C60 fullerene.

I will explain to students that even though they only need to use three features, it is important to learn and understand all five features to excel in the exam. This way, during the exam, the students may p...
AA
Answered by Amit A. • Chemistry tutor
41100 Views

What is the Avogadro constant and what are moles?

The Avogrados constant the number of atoms in a mole. This is 6.02 x10^23. The number of moles are calculated through diving the mass (g) by the relative molecular mass of an element.
DT
Answered by Devina T. • Chemistry tutor
4895 Views

Explain how the different dyes in ink are separated by chromatography

As the water (the solvent) moves up the paper it carries the ink with it, but the dyes in the ink are differently soluble in the solvent AND the dyes are differently attracted to the paper, therefore the dye...
JC
Answered by Jack C. • Chemistry tutor
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